Explain what is distributed cache in mapreduce framework?
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What is an identity mapper and identity reducer?
Mention what are the main configuration parameters that user need to specify to run mapreduce job?
What combiners is and when you should use a combiner in a MapReduce Job?
What does a split do?
What is the difference between RDBMS with Hadoop MapReduce?
How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?
What is Counter in MapReduce?
When Namenode is down what happens to job tracker?
How many Reducers run for a MapReduce job?
With the help of two examples name the map and reduce function purpose
Clarify what is shuffling in map reduce?
What is SequenceFileInputFormat?
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